Charles Darwin's Theory

THEORY OF CHARLES DARWIN
Darwin's Theory of Evolution is the widely held notion that all life is related and has descended from a common ancestor: the birds and the bananas, the fishes and the flowers -- all related.

Darwin's general theory presumes the development of life from non-life and stresses a purely naturalistic "descent with modification".
That is, complex creatures evolve from more simplistic ancestors naturally over time. In a nutshell, as random genetic mutations occur within an organism's genetic code, the beneficial mutations are preserved because they aid survival -- a process known as "natural selection."
These beneficial mutations are passed on to the next generation. Over time, beneficial mutations accumulate and the result is an entirely different organism .






Darwin imagined it might be possible that all life is descended from an original species from ancient times. DNA evidence supports this idea.
5 observations by Darwin
- Species have great fertility. They make more offsprings that can grow to adulthood.
- Populations remain roughly the same size, with modest fluctuatuions.
- Food resources are limited, but are relatively constant most of the time.
From these 3 observations, the may be inferred that in such an enviroment there will be a struggle for survival among individuals.
- In sexually reproducing species , generally no 2 individuals are identical.
- Variation is rampant
*Much of this variation is heritable.

CONCLUSION OF CHARLES DARWIN'S THEORY
From this it may be inferred: In a world of stable populations where each individual must struggle to survive, those with the "best" characteristics will be more likely to survive, and those desirable traits will be passed to their offspring.

These advantageous characteristics are inherited by following generations, becoming dominant among the population through time. This is natural selection. It may be further inferred that natural selection, if carried far enough, makes changes in a population, eventually leading to new species. These observations have been amply demonstrated in biology, and even fossils demonstrate the veracity of these observations.

Ω Variation:
• There is variation in every population.
Ω Competition:
•Organisms compete for limited resources.
Ω Offspring:
Organisms produce more offspring that can survive.
ΩGenetics:
•Organisms pass genetic traits on to their offspring
Ω Natural Selection:
•Those organisms with the most beneficial traits are more likely to survive and reproduce